2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #ifndef PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP
21 #define PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP
23 #include <boost/optional.hpp>
27 #include <QTouchEvent>
29 #include <pv/globalsettings.hpp>
31 #include "pv/util.hpp"
32 #include "viewwidget.hpp"
34 using std::shared_ptr;
47 class Viewport : public ViewWidget, public GlobalSettingsInterface
52 explicit Viewport(View &parent);
56 * Gets the first view item which has a hit-box that contains @c pt .
57 * @param pt the point to search with.
58 * @return the view item that has been found, or and empty
59 * @c shared_ptr if no item was found.
61 shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt);
65 * Indicates when a view item is being hovered over.
66 * @param item The item that is being hovered over, or @c nullptr
67 * if no view item is being hovered over.
69 void item_hover(const shared_ptr<ViewItem> &item, QPoint pos);
72 * Sets this item into the dragged state.
77 * Drag the background by the delta offset.
78 * @param delta the drag offset in pixels.
80 void drag_by(const QPoint &delta);
83 * Sets this item into the un-dragged state.
88 * Gets the items in the view widget.
90 vector< shared_ptr<ViewItem> > items();
93 * Handles touch begin update and end events.
94 * @param e the event that triggered this handler.
96 bool touch_event(QTouchEvent *event);
98 void paintEvent(QPaintEvent *event);
100 void mouseDoubleClickEvent(QMouseEvent *event);
102 void wheelEvent(QWheelEvent *event);
104 void on_setting_changed(const QString &key, const QVariant &value);
107 boost::optional<pv::util::Timestamp> drag_offset_;
109 bool allow_vertical_dragging_;
111 double pinch_offset0_;
112 double pinch_offset1_;
113 bool pinch_zoom_active_;
120 #endif // PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP